Vegetation survey of herring spawning localities in Ganges Harbour, B.C. / by Carl W. Haegele. : Fs97-4/1433E-PDF ; Fs97-4/1433
"The ability to accurately record and assess herring spawn depositions depends to a considerable degree on a knowledge of the vegetative substrate upon which the adhesive eggs are deposited. A map of the shoreline vegetation in Ganges Harbour and vicinity was prepared from aerial photographs of this region taken in July 1975. Just prior to the 1977 herring spawning season, an underwater survey of vegetation in Ganges Harbour was undertaken by divers to ground-check the map. The divers found a large amount of loose drifting vegetation in this area which would not have been distinguishable from rooted vegetation in aerial photographs. Also, in some locations the rooted vegetation was so sparse (as low as 1% cover) that it was either misidentified or missed altogether in interpreting the aerial photographs. In spite of these problems (which were probably unusually acute in this area) the vegetation map prepared from aerial photographs was generally accurate and provided a satisfactory basis for assessing the distribution and abundance of herring egg depositions"--Abstract, page iii.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.932484&sl=1
| Ministère/Organisme | Canada. Fisheries and Marine Service, issuing body. Pacific Biological Station (1972- ), issuing body. |
|---|---|
| Titre | Vegetation survey of herring spawning localities in Ganges Harbour, B.C. / by Carl W. Haegele. |
| Titre de la série | Fisheries and Marine Service manuscript report, 0701-7618 ; 1433 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 4-5). Includes abstracts in English and French. |
| Information sur la publication | Nanaimo, British Columbia : Pacific Biological Station, Fisheries and Marine Service, Department of Fisheries and the Environment, October 1977. ©1977 |
| Auteur / Contributeur | Haegele, C. W., author. |
| Description | 1 online resource (iii, 17 pages) : maps. |
| Numéro de catalogue |
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| Descripteurs | Pacific herring -- Spawning -- British Columbia -- Saltspring Island. Vegetation mapping -- British Columbia -- Saltspring Island. Hareng du Pacifique -- Frai -- Colombie-Britannique -- Saltspring, Île. Cartographie de la végétation -- Colombie-Britannique -- Saltspring, Île. |